Improvement in balanced valves for steam-engines



A. HENRY. Balanced-Valves for Stam-Engines.

NO. !38,804. Patented M'ay13,1873:.

Fo'g 3 witnesses l wv en/tor UNITED STATES PATENT OFFICE 'ALEXANDERHENRY, OF RICHMOND, INDIANA.

IMPROVEMENT IN BALANCED VALVES FOR STEAM-ENGINES.

Specification formin g part of Letters Patent No. !38,804, dated May13,1873; application filed February 12, 1873. i

To all whom it may concem:

'Be it known that I, ALEXANDER HENRY, of Bichmond, county of Wayne andState of Indiana, have invented certain Improvements in Balanoe-Valvesfor Steam-Engines, of which the following is a specification Myinvention relates to an improvement in balance-valves for steam-engines,wherein I use a valve with a double face, the upper face V being fittedto a balance piate or seat, and operating in conjunction with doubleports, the balance-plate being fitted to the upper ports in such manneras to be adjustable, as hei-einafter described,

Figure 1 is a longitudinal vertical section. Fig. 2 is a top view,showing the hollow columns F, which connect with and form a part of theports P. Fig. 3 is a sectional view of the balance-plate or seat D, andshowing the openings V, which connect with the columns F and form theports P in conjunction with the same.

A is the cylinder. B is the valve-seat, fitted in the usual way. O isthe double-faced valve, fitted between the valve-seat B and the plate orupper seat D, which plate or seat fits on and. connects with the hollowcolumns F by means of the openings V, thus extending the ports P upthrough the openings V into the recesses in plate D, through which thestean is received. The hollow columns are made adjustable by beingscrewed into the cylinder, or by any other means that will admit of theplate D being adjusted on top of the valve G to allow of nice adjustmentof the balancingplate on top of the valve. The coiumns may extendthrough and above the balancing-plate D, and the plate be adjusted bymeans of nuts screwed onto the upper ends of the columns, or any othersuitable means that will admit of the adjustment of the plate on top ofthe valve and. the upper ends of the columns. L represents a chamber orvacuum in plate D, and having the vent through the stem I, said stembeing packed by the stuffing-box K on top of the steam-chest lid. H, thebalancing-plate D forming a steam-jont on top of the valve C. The ventthrough the stern I serves as a convenient means of oiling the valve, aswell as forming a vacuum equal to the one below, through which theexhaust passes.

Thus it will be seen that there is no pressure upon the top of the valveG, in consequence of making the ports P extend above the valve throughthe openings V in the balancing-plate D, and being of the samedimensions of those below and opening and closing at the same time andreceiving steam through the ports P and R simultaueously, and being cutoff in the same manner. The ports P and R being connected, the exhaustrelieves both at the same time. The oolumns F are of the same height ofthe valve O, the plate D snugly fitting upon the upper ends of theoolumns and the top of valve U. The steam-chest lid may be removed andreplaced at will without disturbing either the valve or 'thebalaneingplate.

Gr is the steam-chest. E is the valve-sten. M is the e haust-port; B Rand P P, receiving-ports.

I am aware that double ports and balancin gplates are not new;therefore,'I do not claim them, broadly; but

What I claim, and desire to secure by Letters Patent, is- I l. Aslide-valve and balancing-plate, in combination with the hollow eolunnsF, when said columns are so c-onstructed and arranged as to admit of theadjustment of the balancing-plate upon the top of the valve and upon thecolumns, substantially as described.

2. The baiancing-plate D, as shown and described, said plate having theopenings V'connecting with the colums F and the sten I attaohed to thetop of said balaneing-plate, in combination with the stuffing-box K, allarranged and operatin g substantially as described.

ALEXANDER HENRY.

. Witnesses:

NELSON A. HUNT, ORLANDO B. HUNT.

